/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.handmark.pulltorefresh;


import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ScrollView;

public class PullToRefreshScrollView extends PullToRefreshBase<ScrollView> {

	public PullToRefreshScrollView(Context context) {
		super(context);
	}

	public PullToRefreshScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public PullToRefreshScrollView(Context context, Mode mode) {
		super(context, mode);
	}

	public PullToRefreshScrollView(Context context, Mode mode, AnimationStyle style) {
		super(context, mode, style);
	}

	@Override
	public final Orientation getPullToRefreshScrollDirection() {
		return Orientation.VERTICAL;
	}

	@Override
	protected ScrollView createRefreshableView(Context context, AttributeSet attrs) {
		ScrollView scrollView;
//		if (VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD) {
//			scrollView = new InternalScrollViewSDK9(context, attrs);
//		} else {
			scrollView = new ScrollView(context, attrs);
//		}

		// Use Generated ID (from res/values/ids.xml)
		scrollView.setId(1);
		return scrollView;
	}

	@Override
	protected boolean isReadyForPullStart() {
		return mRefreshableView.getScrollY() == 0;
	}

	@Override
	protected boolean isReadyForPullEnd() {
		View scrollViewChild = mRefreshableView.getChildAt(0);
		if (null != scrollViewChild) {
			return mRefreshableView.getScrollY() >= (scrollViewChild.getHeight() - getHeight());
		}
		return false;
	}

//	@TargetApi(9)
//	final class InternalScrollViewSDK9 extends ScrollView {
//
//		public InternalScrollViewSDK9(Context context, AttributeSet attrs) {
//			super(context, attrs);
//		}
//
//		@Override
//		protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX,
//				int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {
//
//			final boolean returnValue = super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX,
//					scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);
//
//			// Does all of the hard work...
//			OverscrollHelper.overScrollBy(PullToRefreshScrollView.this, deltaX, scrollX, deltaY, scrollY,
//					getScrollRange(), isTouchEvent);
//
//			return returnValue;
//		}
//
//		/**
//		 * Taken from the AOSP ScrollView source
//		 */
//		private int getScrollRange() {
//			int scrollRange = 0;
//			if (getChildCount() > 0) {
//				View child = getChildAt(0);
//				scrollRange = Math.max(0, child.getHeight() - (getHeight() - getPaddingBottom() - getPaddingTop()));
//			}
//			return scrollRange;
//		}
//	}
}
